diff options
Diffstat (limited to 'sys/nfsclient/nfs_nfsiod.c')
| -rw-r--r-- | sys/nfsclient/nfs_nfsiod.c | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/sys/nfsclient/nfs_nfsiod.c b/sys/nfsclient/nfs_nfsiod.c new file mode 100644 index 0000000..5d86b42 --- /dev/null +++ b/sys/nfsclient/nfs_nfsiod.c @@ -0,0 +1,874 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Rick Macklem at The University of Guelph. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)nfs_syscalls.c 8.3 (Berkeley) 1/4/94 + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/file.h> +#include <sys/stat.h> +#include <sys/vnode.h> +#include <sys/mount.h> +#include <sys/proc.h> +#include <sys/uio.h> +#include <sys/malloc.h> +#include <sys/buf.h> +#include <sys/mbuf.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/domain.h> +#include <sys/protosw.h> +#include <sys/namei.h> +#include <sys/syslog.h> + +#include <netinet/in.h> +#include <netinet/tcp.h> +#ifdef ISO +#include <netiso/iso.h> +#endif +#include <nfs/rpcv2.h> +#include <nfs/nfsv2.h> +#include <nfs/nfs.h> +#include <nfs/nfsrvcache.h> +#include <nfs/nfsmount.h> +#include <nfs/nfsnode.h> +#include <nfs/nqnfs.h> +#include <nfs/nfsrtt.h> + +/* Global defs. */ +extern u_long nfs_prog, nfs_vers; +extern int (*nfsrv_procs[NFS_NPROCS])(); +extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; +extern int nfs_numasync; +extern time_t nqnfsstarttime; +extern struct nfsrv_req nsrvq_head; +extern struct nfsd nfsd_head; +extern int nqsrv_writeslack; +extern int nfsrtton; +struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock; +int nuidhash_max = NFS_MAXUIDHASH; +static int nfs_numnfsd = 0; +int nfsd_waiting = 0; +static int notstarted = 1; +static int modify_flag = 0; +static struct nfsdrt nfsdrt; +void nfsrv_cleancache(), nfsrv_rcv(), nfsrv_wakenfsd(), nfs_sndunlock(); +static void nfsd_rt(); +void nfsrv_slpderef(), nfsrv_init(); + +#define TRUE 1 +#define FALSE 0 + +static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; +/* + * NFS server system calls + * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c + */ + +/* + * Get file handle system call + */ +struct getfh_args { + char *fname; + fhandle_t *fhp; +}; +getfh(p, uap, retval) + struct proc *p; + register struct getfh_args *uap; + int *retval; +{ + register struct vnode *vp; + fhandle_t fh; + int error; + struct nameidata nd; + + /* + * Must be super user + */ + if (error = suser(p->p_ucred, &p->p_acflag)) + return (error); + NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); + if (error = namei(&nd)) + return (error); + vp = nd.ni_vp; + bzero((caddr_t)&fh, sizeof(fh)); + fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; + error = VFS_VPTOFH(vp, &fh.fh_fid); + vput(vp); + if (error) + return (error); + error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh)); + return (error); +} + +static struct nfssvc_sock nfssvc_sockhead; + +/* + * Nfs server psuedo system call for the nfsd's + * Based on the flag value it either: + * - adds a socket to the selection list + * - remains in the kernel as an nfsd + * - remains in the kernel as an nfsiod + */ +struct nfssvc_args { + int flag; + caddr_t argp; +}; +nfssvc(p, uap, retval) + struct proc *p; + register struct nfssvc_args *uap; + int *retval; +{ + struct nameidata nd; + struct file *fp; + struct mbuf *nam; + struct nfsd_args nfsdarg; + struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; + struct nfsd_cargs ncd; + struct nfsd *nfsd; + struct nfssvc_sock *slp; + struct nfsuid *nuidp, **nuh; + struct nfsmount *nmp; + int error; + + /* + * Must be super user + */ + if (error = suser(p->p_ucred, &p->p_acflag)) + return (error); + while (nfssvc_sockhead.ns_flag & SLP_INIT) { + nfssvc_sockhead.ns_flag |= SLP_WANTINIT; + (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0); + } + if (uap->flag & NFSSVC_BIOD) + error = nfssvc_iod(p); + else if (uap->flag & NFSSVC_MNTD) { + if (error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd))) + return (error); + NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, + ncd.ncd_dirp, p); + if (error = namei(&nd)) + return (error); + if ((nd.ni_vp->v_flag & VROOT) == 0) + error = EINVAL; + nmp = VFSTONFS(nd.ni_vp->v_mount); + vput(nd.ni_vp); + if (error) + return (error); + if ((nmp->nm_flag & NFSMNT_MNTD) && + (uap->flag & NFSSVC_GOTAUTH) == 0) + return (0); + nmp->nm_flag |= NFSMNT_MNTD; + error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag, + uap->argp, p); + } else if (uap->flag & NFSSVC_ADDSOCK) { + if (error = copyin(uap->argp, (caddr_t)&nfsdarg, + sizeof(nfsdarg))) + return (error); + if (error = getsock(p->p_fd, nfsdarg.sock, &fp)) + return (error); + /* + * Get the client address for connected sockets. + */ + if (nfsdarg.name == NULL || nfsdarg.namelen == 0) + nam = (struct mbuf *)0; + else if (error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, + MT_SONAME)) + return (error); + error = nfssvc_addsock(fp, nam); + } else { + if (error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd))) + return (error); + if ((uap->flag & NFSSVC_AUTHIN) && (nfsd = nsd->nsd_nfsd) && + (nfsd->nd_slp->ns_flag & SLP_VALID)) { + slp = nfsd->nd_slp; + + /* + * First check to see if another nfsd has already + * added this credential. + */ + nuidp = slp->ns_uidh[NUIDHASH(nsd->nsd_uid)]; + while (nuidp) { + if (nuidp->nu_uid == nsd->nsd_uid) + break; + nuidp = nuidp->nu_hnext; + } + if (!nuidp) { + /* + * Nope, so we will. + */ + if (slp->ns_numuids < nuidhash_max) { + slp->ns_numuids++; + nuidp = (struct nfsuid *) + malloc(sizeof (struct nfsuid), M_NFSUID, + M_WAITOK); + } else + nuidp = (struct nfsuid *)0; + if ((slp->ns_flag & SLP_VALID) == 0) { + if (nuidp) + free((caddr_t)nuidp, M_NFSUID); + } else { + if (nuidp == (struct nfsuid *)0) { + nuidp = slp->ns_lruprev; + remque(nuidp); + if (nuidp->nu_hprev) + nuidp->nu_hprev->nu_hnext = + nuidp->nu_hnext; + if (nuidp->nu_hnext) + nuidp->nu_hnext->nu_hprev = + nuidp->nu_hprev; + } + nuidp->nu_cr = nsd->nsd_cr; + if (nuidp->nu_cr.cr_ngroups > NGROUPS) + nuidp->nu_cr.cr_ngroups = NGROUPS; + nuidp->nu_cr.cr_ref = 1; + nuidp->nu_uid = nsd->nsd_uid; + insque(nuidp, (struct nfsuid *)slp); + nuh = &slp->ns_uidh[NUIDHASH(nsd->nsd_uid)]; + if (nuidp->nu_hnext = *nuh) + nuidp->nu_hnext->nu_hprev = nuidp; + nuidp->nu_hprev = (struct nfsuid *)0; + *nuh = nuidp; + } + } + } + if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) + nfsd->nd_flag |= NFSD_AUTHFAIL; + error = nfssvc_nfsd(nsd, uap->argp, p); + } + if (error == EINTR || error == ERESTART) + error = 0; + return (error); +} + +/* + * Adds a socket to the list for servicing by nfsds. + */ +nfssvc_addsock(fp, mynam) + struct file *fp; + struct mbuf *mynam; +{ + register struct mbuf *m; + register int siz; + register struct nfssvc_sock *slp; + register struct socket *so; + struct nfssvc_sock *tslp; + int error, s; + + so = (struct socket *)fp->f_data; + tslp = (struct nfssvc_sock *)0; + /* + * Add it to the list, as required. + */ + if (so->so_proto->pr_protocol == IPPROTO_UDP) { + tslp = nfs_udpsock; + if (tslp->ns_flag & SLP_VALID) { + m_freem(mynam); + return (EPERM); + } +#ifdef ISO + } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { + tslp = nfs_cltpsock; + if (tslp->ns_flag & SLP_VALID) { + m_freem(mynam); + return (EPERM); + } +#endif /* ISO */ + } + if (so->so_type == SOCK_STREAM) + siz = NFS_MAXPACKET + sizeof (u_long); + else + siz = NFS_MAXPACKET; + if (error = soreserve(so, siz, siz)) { + m_freem(mynam); + return (error); + } + + /* + * Set protocol specific options { for now TCP only } and + * reserve some space. For datagram sockets, this can get called + * repeatedly for the same socket, but that isn't harmful. + */ + if (so->so_type == SOCK_STREAM) { + MGET(m, M_WAIT, MT_SOOPTS); + *mtod(m, int *) = 1; + m->m_len = sizeof(int); + sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); + } + if (so->so_proto->pr_domain->dom_family == AF_INET && + so->so_proto->pr_protocol == IPPROTO_TCP) { + MGET(m, M_WAIT, MT_SOOPTS); + *mtod(m, int *) = 1; + m->m_len = sizeof(int); + sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); + } + so->so_rcv.sb_flags &= ~SB_NOINTR; + so->so_rcv.sb_timeo = 0; + so->so_snd.sb_flags &= ~SB_NOINTR; + so->so_snd.sb_timeo = 0; + if (tslp) + slp = tslp; + else { + slp = (struct nfssvc_sock *) + malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); + bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); + slp->ns_prev = nfssvc_sockhead.ns_prev; + slp->ns_prev->ns_next = slp; + slp->ns_next = &nfssvc_sockhead; + nfssvc_sockhead.ns_prev = slp; + slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp; + } + slp->ns_so = so; + slp->ns_nam = mynam; + fp->f_count++; + slp->ns_fp = fp; + s = splnet(); + so->so_upcallarg = (caddr_t)slp; + so->so_upcall = nfsrv_rcv; + slp->ns_flag = (SLP_VALID | SLP_NEEDQ); + nfsrv_wakenfsd(slp); + splx(s); + return (0); +} + +/* + * Called by nfssvc() for nfsds. Just loops around servicing rpc requests + * until it is killed by a signal. + */ +nfssvc_nfsd(nsd, argp, p) + struct nfsd_srvargs *nsd; + caddr_t argp; + struct proc *p; +{ + register struct mbuf *m, *nam2; + register int siz; + register struct nfssvc_sock *slp; + register struct socket *so; + register int *solockp; + struct nfsd *nd = nsd->nsd_nfsd; + struct mbuf *mreq, *nam; + struct timeval starttime; + struct nfsuid *uidp; + int error, cacherep, s; + int sotype; + + s = splnet(); + if (nd == (struct nfsd *)0) { + nsd->nsd_nfsd = nd = (struct nfsd *) + malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); + bzero((caddr_t)nd, sizeof (struct nfsd)); + nd->nd_procp = p; + nd->nd_cr.cr_ref = 1; + insque(nd, &nfsd_head); + nd->nd_nqlflag = NQL_NOVAL; + nfs_numnfsd++; + } + /* + * Loop getting rpc requests until SIGKILL. + */ + for (;;) { + if ((nd->nd_flag & NFSD_REQINPROG) == 0) { + while (nd->nd_slp == (struct nfssvc_sock *)0 && + (nfsd_head.nd_flag & NFSD_CHECKSLP) == 0) { + nd->nd_flag |= NFSD_WAITING; + nfsd_waiting++; + error = tsleep((caddr_t)nd, PSOCK | PCATCH, "nfsd", 0); + nfsd_waiting--; + if (error) + goto done; + } + if (nd->nd_slp == (struct nfssvc_sock *)0 && + (nfsd_head.nd_flag & NFSD_CHECKSLP)) { + slp = nfssvc_sockhead.ns_next; + while (slp != &nfssvc_sockhead) { + if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) + == (SLP_VALID | SLP_DOREC)) { + slp->ns_flag &= ~SLP_DOREC; + slp->ns_sref++; + nd->nd_slp = slp; + break; + } + slp = slp->ns_next; + } + if (slp == &nfssvc_sockhead) + nfsd_head.nd_flag &= ~NFSD_CHECKSLP; + } + if ((slp = nd->nd_slp) == (struct nfssvc_sock *)0) + continue; + if (slp->ns_flag & SLP_VALID) { + if (slp->ns_flag & SLP_DISCONN) + nfsrv_zapsock(slp); + else if (slp->ns_flag & SLP_NEEDQ) { + slp->ns_flag &= ~SLP_NEEDQ; + (void) nfs_sndlock(&slp->ns_solock, + (struct nfsreq *)0); + nfsrv_rcv(slp->ns_so, (caddr_t)slp, + M_WAIT); + nfs_sndunlock(&slp->ns_solock); + } + error = nfsrv_dorec(slp, nd); + nd->nd_flag |= NFSD_REQINPROG; + } + } else { + error = 0; + slp = nd->nd_slp; + } + if (error || (slp->ns_flag & SLP_VALID) == 0) { + nd->nd_slp = (struct nfssvc_sock *)0; + nd->nd_flag &= ~NFSD_REQINPROG; + nfsrv_slpderef(slp); + continue; + } + splx(s); + so = slp->ns_so; + sotype = so->so_type; + starttime = time; + if (so->so_proto->pr_flags & PR_CONNREQUIRED) + solockp = &slp->ns_solock; + else + solockp = (int *)0; + /* + * nam == nam2 for connectionless protocols such as UDP + * nam2 == NULL for connection based protocols to disable + * recent request caching. + */ + if (nam2 = nd->nd_nam) { + nam = nam2; + cacherep = RC_CHECKIT; + } else { + nam = slp->ns_nam; + cacherep = RC_DOIT; + } + + /* + * Check to see if authorization is needed. + */ + if (nd->nd_flag & NFSD_NEEDAUTH) { + static int logauth = 0; + + nd->nd_flag &= ~NFSD_NEEDAUTH; + /* + * Check for a mapping already installed. + */ + uidp = slp->ns_uidh[NUIDHASH(nd->nd_cr.cr_uid)]; + while (uidp) { + if (uidp->nu_uid == nd->nd_cr.cr_uid) + break; + uidp = uidp->nu_hnext; + } + if (!uidp) { + nsd->nsd_uid = nd->nd_cr.cr_uid; + if (nam2 && logauth++ == 0) + log(LOG_WARNING, "Kerberized NFS using UDP\n"); + nsd->nsd_haddr = + mtod(nam, struct sockaddr_in *)->sin_addr.s_addr; + nsd->nsd_authlen = nd->nd_authlen; + if (copyout(nd->nd_authstr, nsd->nsd_authstr, + nd->nd_authlen) == 0 && + copyout((caddr_t)nsd, argp, sizeof (*nsd)) == 0) + return (ENEEDAUTH); + cacherep = RC_DROPIT; + } + } + if (cacherep == RC_CHECKIT) + cacherep = nfsrv_getcache(nam2, nd, &mreq); + + /* + * Check for just starting up for NQNFS and send + * fake "try again later" replies to the NQNFS clients. + */ + if (notstarted && nqnfsstarttime <= time.tv_sec) { + if (modify_flag) { + nqnfsstarttime = time.tv_sec + nqsrv_writeslack; + modify_flag = 0; + } else + notstarted = 0; + } + if (notstarted) { + if (nd->nd_nqlflag == NQL_NOVAL) + cacherep = RC_DROPIT; + else if (nd->nd_procnum != NFSPROC_WRITE) { + nd->nd_procnum = NFSPROC_NOOP; + nd->nd_repstat = NQNFS_TRYLATER; + cacherep = RC_DOIT; + } else + modify_flag = 1; + } else if (nd->nd_flag & NFSD_AUTHFAIL) { + nd->nd_flag &= ~NFSD_AUTHFAIL; + nd->nd_procnum = NFSPROC_NOOP; + nd->nd_repstat = NQNFS_AUTHERR; + cacherep = RC_DOIT; + } + + switch (cacherep) { + case RC_DOIT: + error = (*(nfsrv_procs[nd->nd_procnum]))(nd, + nd->nd_mrep, nd->nd_md, nd->nd_dpos, &nd->nd_cr, + nam, &mreq); + if (nd->nd_cr.cr_ref != 1) { + printf("nfssvc cref=%d\n", nd->nd_cr.cr_ref); + panic("nfssvc cref"); + } + if (error) { + if (nd->nd_procnum != NQNFSPROC_VACATED) + nfsstats.srv_errs++; + if (nam2) { + nfsrv_updatecache(nam2, nd, FALSE, mreq); + m_freem(nam2); + } + break; + } + nfsstats.srvrpccnt[nd->nd_procnum]++; + if (nam2) + nfsrv_updatecache(nam2, nd, TRUE, mreq); + nd->nd_mrep = (struct mbuf *)0; + case RC_REPLY: + m = mreq; + siz = 0; + while (m) { + siz += m->m_len; + m = m->m_next; + } + if (siz <= 0 || siz > NFS_MAXPACKET) { + printf("mbuf siz=%d\n",siz); + panic("Bad nfs svc reply"); + } + m = mreq; + m->m_pkthdr.len = siz; + m->m_pkthdr.rcvif = (struct ifnet *)0; + /* + * For stream protocols, prepend a Sun RPC + * Record Mark. + */ + if (sotype == SOCK_STREAM) { + M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); + *mtod(m, u_long *) = htonl(0x80000000 | siz); + } + if (solockp) + (void) nfs_sndlock(solockp, (struct nfsreq *)0); + if (slp->ns_flag & SLP_VALID) + error = nfs_send(so, nam2, m, (struct nfsreq *)0); + else { + error = EPIPE; + m_freem(m); + } + if (nfsrtton) + nfsd_rt(&starttime, sotype, nd, nam, cacherep); + if (nam2) + MFREE(nam2, m); + if (nd->nd_mrep) + m_freem(nd->nd_mrep); + if (error == EPIPE) + nfsrv_zapsock(slp); + if (solockp) + nfs_sndunlock(solockp); + if (error == EINTR || error == ERESTART) { + nfsrv_slpderef(slp); + s = splnet(); + goto done; + } + break; + case RC_DROPIT: + if (nfsrtton) + nfsd_rt(&starttime, sotype, nd, nam, cacherep); + m_freem(nd->nd_mrep); + m_freem(nam2); + break; + }; + s = splnet(); + if (nfsrv_dorec(slp, nd)) { + nd->nd_flag &= ~NFSD_REQINPROG; + nd->nd_slp = (struct nfssvc_sock *)0; + nfsrv_slpderef(slp); + } + } +done: + remque(nd); + splx(s); + free((caddr_t)nd, M_NFSD); + nsd->nsd_nfsd = (struct nfsd *)0; + if (--nfs_numnfsd == 0) + nfsrv_init(TRUE); /* Reinitialize everything */ + return (error); +} + +/* + * Asynchronous I/O daemons for client nfs. + * They do read-ahead and write-behind operations on the block I/O cache. + * Never returns unless it fails or gets killed. + */ +nfssvc_iod(p) + struct proc *p; +{ + register struct buf *bp; + register int i, myiod; + int error = 0; + + /* + * Assign my position or return error if too many already running + */ + myiod = -1; + for (i = 0; i < NFS_MAXASYNCDAEMON; i++) + if (nfs_asyncdaemon[i] == 0) { + nfs_asyncdaemon[i]++; + myiod = i; + break; + } + if (myiod == -1) + return (EBUSY); + nfs_numasync++; + /* + * Just loop around doin our stuff until SIGKILL + */ + for (;;) { + while (nfs_bufq.tqh_first == NULL && error == 0) { + nfs_iodwant[myiod] = p; + error = tsleep((caddr_t)&nfs_iodwant[myiod], + PWAIT | PCATCH, "nfsidl", 0); + } + while ((bp = nfs_bufq.tqh_first) != NULL) { + /* Take one off the front of the list */ + TAILQ_REMOVE(&nfs_bufq, bp, b_freelist); + if (bp->b_flags & B_READ) + (void) nfs_doio(bp, bp->b_rcred, (struct proc *)0); + else + (void) nfs_doio(bp, bp->b_wcred, (struct proc *)0); + } + if (error) { + nfs_asyncdaemon[myiod] = 0; + nfs_numasync--; + return (error); + } + } +} + +/* + * Shut down a socket associated with an nfssvc_sock structure. + * Should be called with the send lock set, if required. + * The trick here is to increment the sref at the start, so that the nfsds + * will stop using it and clear ns_flag at the end so that it will not be + * reassigned during cleanup. + */ +nfsrv_zapsock(slp) + register struct nfssvc_sock *slp; +{ + register struct nfsuid *nuidp, *onuidp; + register int i; + struct socket *so; + struct file *fp; + struct mbuf *m; + + slp->ns_flag &= ~SLP_ALLFLAGS; + if (fp = slp->ns_fp) { + slp->ns_fp = (struct file *)0; + so = slp->ns_so; + so->so_upcall = NULL; + soshutdown(so, 2); + closef(fp, (struct proc *)0); + if (slp->ns_nam) + MFREE(slp->ns_nam, m); + m_freem(slp->ns_raw); + m_freem(slp->ns_rec); + nuidp = slp->ns_lrunext; + while (nuidp != (struct nfsuid *)slp) { + onuidp = nuidp; + nuidp = nuidp->nu_lrunext; + free((caddr_t)onuidp, M_NFSUID); + } + slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp; + for (i = 0; i < NUIDHASHSIZ; i++) + slp->ns_uidh[i] = (struct nfsuid *)0; + } +} + +/* + * Get an authorization string for the uid by having the mount_nfs sitting + * on this mount point porpous out of the kernel and do it. + */ +nfs_getauth(nmp, rep, cred, auth_type, auth_str, auth_len) + register struct nfsmount *nmp; + struct nfsreq *rep; + struct ucred *cred; + int *auth_type; + char **auth_str; + int *auth_len; +{ + int error = 0; + + while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) { + nmp->nm_flag |= NFSMNT_WANTAUTH; + (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, + "nfsauth1", 2 * hz); + if (error = nfs_sigintr(nmp, rep, rep->r_procp)) { + nmp->nm_flag &= ~NFSMNT_WANTAUTH; + return (error); + } + } + nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); + nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); + nmp->nm_authuid = cred->cr_uid; + wakeup((caddr_t)&nmp->nm_authstr); + + /* + * And wait for mount_nfs to do its stuff. + */ + while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) { + (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, + "nfsauth2", 2 * hz); + error = nfs_sigintr(nmp, rep, rep->r_procp); + } + if (nmp->nm_flag & NFSMNT_AUTHERR) { + nmp->nm_flag &= ~NFSMNT_AUTHERR; + error = EAUTH; + } + if (error) + free((caddr_t)*auth_str, M_TEMP); + else { + *auth_type = nmp->nm_authtype; + *auth_len = nmp->nm_authlen; + } + nmp->nm_flag &= ~NFSMNT_HASAUTH; + nmp->nm_flag |= NFSMNT_WAITAUTH; + if (nmp->nm_flag & NFSMNT_WANTAUTH) { + nmp->nm_flag &= ~NFSMNT_WANTAUTH; + wakeup((caddr_t)&nmp->nm_authtype); + } + return (error); +} + +/* + * Derefence a server socket structure. If it has no more references and + * is no longer valid, you can throw it away. + */ +void +nfsrv_slpderef(slp) + register struct nfssvc_sock *slp; +{ + if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { + slp->ns_prev->ns_next = slp->ns_next; + slp->ns_next->ns_prev = slp->ns_prev; + free((caddr_t)slp, M_NFSSVC); + } +} + +/* + * Initialize the data structures for the server. + * Handshake with any new nfsds starting up to avoid any chance of + * corruption. + */ +void +nfsrv_init(terminating) + int terminating; +{ + register struct nfssvc_sock *slp; + struct nfssvc_sock *oslp; + + if (nfssvc_sockhead.ns_flag & SLP_INIT) + panic("nfsd init"); + nfssvc_sockhead.ns_flag |= SLP_INIT; + if (terminating) { + slp = nfssvc_sockhead.ns_next; + while (slp != &nfssvc_sockhead) { + if (slp->ns_flag & SLP_VALID) + nfsrv_zapsock(slp); + slp->ns_next->ns_prev = slp->ns_prev; + slp->ns_prev->ns_next = slp->ns_next; + oslp = slp; + slp = slp->ns_next; + free((caddr_t)oslp, M_NFSSVC); + } + nfsrv_cleancache(); /* And clear out server cache */ + } + nfs_udpsock = (struct nfssvc_sock *) + malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); + bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); + nfs_cltpsock = (struct nfssvc_sock *) + malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); + bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock)); + nfssvc_sockhead.ns_next = nfs_udpsock; + nfs_udpsock->ns_next = nfs_cltpsock; + nfs_cltpsock->ns_next = &nfssvc_sockhead; + nfssvc_sockhead.ns_prev = nfs_cltpsock; + nfs_cltpsock->ns_prev = nfs_udpsock; + nfs_udpsock->ns_prev = &nfssvc_sockhead; + nfs_udpsock->ns_lrunext = nfs_udpsock->ns_lruprev = + (struct nfsuid *)nfs_udpsock; + nfs_cltpsock->ns_lrunext = nfs_cltpsock->ns_lruprev = + (struct nfsuid *)nfs_cltpsock; + nfsd_head.nd_next = nfsd_head.nd_prev = &nfsd_head; + nfsd_head.nd_flag = 0; + nfssvc_sockhead.ns_flag &= ~SLP_INIT; + if (nfssvc_sockhead.ns_flag & SLP_WANTINIT) { + nfssvc_sockhead.ns_flag &= ~SLP_WANTINIT; + wakeup((caddr_t)&nfssvc_sockhead); + } +} + +/* + * Add entries to the server monitor log. + */ +static void +nfsd_rt(startp, sotype, nd, nam, cacherep) + struct timeval *startp; + int sotype; + register struct nfsd *nd; + struct mbuf *nam; + int cacherep; +{ + register struct drt *rt; + + rt = &nfsdrt.drt[nfsdrt.pos]; + if (cacherep == RC_DOIT) + rt->flag = 0; + else if (cacherep == RC_REPLY) + rt->flag = DRT_CACHEREPLY; + else + rt->flag = DRT_CACHEDROP; + if (sotype == SOCK_STREAM) + rt->flag |= DRT_TCP; + if (nd->nd_nqlflag != NQL_NOVAL) + rt->flag |= DRT_NQNFS; + rt->proc = nd->nd_procnum; + if (mtod(nam, struct sockaddr *)->sa_family == AF_INET) + rt->ipadr = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr; + else + rt->ipadr = INADDR_ANY; + rt->resptime = ((time.tv_sec - startp->tv_sec) * 1000000) + + (time.tv_usec - startp->tv_usec); + rt->tstamp = time; + nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; +} |
